[SCSI] ufs: use devres functions for ufshcd

This patch replaces normal calls for resource allocation with devm_*()
derivative functions. It makes resource freeing simpler.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Santosh Y <santoshsy@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

3 files changed, 39 insertions, 120 deletions

diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c
index 5cb1d75f5868..48be39a6f6d7 100644
--- a/drivers/scsi/ufs/ufshcd-pci.c
+++ b/drivers/scsi/ufs/ufshcd-pci.c
@@ -92,7 +92,6 @@ static void ufshcd_pci_remove(struct pci_dev *pdev)
         struct ufs_hba *hba = pci_get_drvdata(pdev);
 
         disable_irq(pdev->irq);
-        free_irq(pdev->irq, hba);
         ufshcd_remove(hba);
         pci_release_regions(pdev);
         pci_set_drvdata(pdev, NULL);
diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.c b/drivers/scsi/ufs/ufshcd-pltfrm.c
index 3db2ee1a38bd..0e48827c86bd 100644
--- a/drivers/scsi/ufs/ufshcd-pltfrm.c
+++ b/drivers/scsi/ufs/ufshcd-pltfrm.c
@@ -33,9 +33,10 @@
  * this program.
  */
 
-#include "ufshcd.h"
 #include <linux/platform_device.h>
 
+#include "ufshcd.h"
+
 #ifdef CONFIG_PM
 /**
  * ufshcd_pltfrm_suspend - suspend power management function
@@ -97,62 +98,45 @@ static int ufshcd_pltfrm_probe(struct platform_device *pdev)
         struct ufs_hba *hba;
         void __iomem *mmio_base;
         struct resource *mem_res;
-        struct resource *irq_res;
-        resource_size_t mem_size;
-        int err;
+        int irq, err;
         struct device *dev = &pdev->dev;
 
         mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!mem_res) {
-                dev_err(&pdev->dev,
-                        "Memory resource not available\n");
+                dev_err(dev, "Memory resource not available\n");
                 err = -ENODEV;
-                goto out_error;
+                goto out;
         }
 
-        mem_size = resource_size(mem_res);
-        if (!request_mem_region(mem_res->start, mem_size, "ufshcd")) {
-                dev_err(&pdev->dev,
-                        "Cannot reserve the memory resource\n");
-                err = -EBUSY;
-                goto out_error;
+        mmio_base = devm_ioremap_resource(dev, mem_res);
+        if (IS_ERR(mmio_base)) {
+                dev_err(dev, "memory map failed\n");
+                err = PTR_ERR(mmio_base);
+                goto out;
         }
 
-        mmio_base = ioremap_nocache(mem_res->start, mem_size);
-        if (!mmio_base) {
-                dev_err(&pdev->dev, "memory map failed\n");
-                err = -ENOMEM;
-                goto out_release_regions;
-        }
-
-        irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-        if (!irq_res) {
-                dev_err(&pdev->dev, "IRQ resource not available\n");
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0) {
+                dev_err(dev, "IRQ resource not available\n");
                 err = -ENODEV;
-                goto out_iounmap;
+                goto out;
         }
 
         err = dma_set_coherent_mask(dev, dev->coherent_dma_mask);
         if (err) {
-                dev_err(&pdev->dev, "set dma mask failed\n");
-                goto out_iounmap;
+                dev_err(dev, "set dma mask failed\n");
+                goto out;
         }
 
-        err = ufshcd_init(&pdev->dev, &hba, mmio_base, irq_res->start);
+        err = ufshcd_init(dev, &hba, mmio_base, irq);
         if (err) {
-                dev_err(&pdev->dev, "Intialization failed\n");
-                goto out_iounmap;
+                dev_err(dev, "Intialization failed\n");
+                goto out;
         }
 
         platform_set_drvdata(pdev, hba);
 
-        return 0;
-
-out_iounmap:
-        iounmap(mmio_base);
-out_release_regions:
-        release_mem_region(mem_res->start, mem_size);
-out_error:
+out:
         return err;
 }
 
@@ -164,26 +148,10 @@ out_error:
  */
 static int ufshcd_pltfrm_remove(struct platform_device *pdev)
 {
-        struct resource *mem_res;
-        resource_size_t mem_size;
         struct ufs_hba *hba =  platform_get_drvdata(pdev);
 
         disable_irq(hba->irq);
-
-        /* Some buggy controllers raise interrupt after
-         * the resources are removed. So first we unregister the
-         * irq handler and then the resources used by driver
-         */
-
-        free_irq(hba->irq, hba);
         ufshcd_remove(hba);
-        mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!mem_res)
-                dev_err(&pdev->dev, "ufshcd: Memory resource not available\n");
-        else {
-                mem_size = resource_size(mem_res);
-                release_mem_region(mem_res->start, mem_size);
-        }
         return 0;
 }
 
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 2230f1412d88..aba461f0f11c 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -191,38 +191,6 @@ static inline int ufshcd_get_uic_cmd_result(struct ufs_hba *hba)
 }
 
 /**
- * ufshcd_free_hba_memory - Free allocated memory for LRB, request
- *                          and task lists
- * @hba: Pointer to adapter instance
- */
-static inline void ufshcd_free_hba_memory(struct ufs_hba *hba)
-{
-        size_t utmrdl_size, utrdl_size, ucdl_size;
-
-        kfree(hba->lrb);
-
-        if (hba->utmrdl_base_addr) {
-                utmrdl_size = sizeof(struct utp_task_req_desc) * hba->nutmrs;
-                dma_free_coherent(hba->dev, utmrdl_size,
-                                  hba->utmrdl_base_addr, hba->utmrdl_dma_addr);
-        }
-
-        if (hba->utrdl_base_addr) {
-                utrdl_size =
-                (sizeof(struct utp_transfer_req_desc) * hba->nutrs);
-                dma_free_coherent(hba->dev, utrdl_size,
-                                  hba->utrdl_base_addr, hba->utrdl_dma_addr);
-        }
-
-        if (hba->ucdl_base_addr) {
-                ucdl_size =
-                (sizeof(struct utp_transfer_cmd_desc) * hba->nutrs);
-                dma_free_coherent(hba->dev, ucdl_size,
-                                  hba->ucdl_base_addr, hba->ucdl_dma_addr);
-        }
-}
-
-/**
  * ufshcd_is_valid_req_rsp - checks if controller TR response is valid
  * @ucd_rsp_ptr: pointer to response UPIU
  *
@@ -690,10 +658,10 @@ static int ufshcd_memory_alloc(struct ufs_hba *hba)
 
         /* Allocate memory for UTP command descriptors */
         ucdl_size = (sizeof(struct utp_transfer_cmd_desc) * hba->nutrs);
-        hba->ucdl_base_addr = dma_alloc_coherent(hba->dev,
-                                                 ucdl_size,
-                                                 &hba->ucdl_dma_addr,
-                                                 GFP_KERNEL);
+        hba->ucdl_base_addr = dmam_alloc_coherent(hba->dev,
+                                                  ucdl_size,
+                                                  &hba->ucdl_dma_addr,
+                                                  GFP_KERNEL);
 
         /*
          * UFSHCI requires UTP command descriptor to be 128 byte aligned.
@@ -713,10 +681,10 @@ static int ufshcd_memory_alloc(struct ufs_hba *hba)
          * UFSHCI requires 1024 byte alignment of UTRD
          */
         utrdl_size = (sizeof(struct utp_transfer_req_desc) * hba->nutrs);
-        hba->utrdl_base_addr = dma_alloc_coherent(hba->dev,
-                                                  utrdl_size,
-                                                  &hba->utrdl_dma_addr,
-                                                  GFP_KERNEL);
+        hba->utrdl_base_addr = dmam_alloc_coherent(hba->dev,
+                                                   utrdl_size,
+                                                   &hba->utrdl_dma_addr,
+                                                   GFP_KERNEL);
         if (!hba->utrdl_base_addr ||
             WARN_ON(hba->utrdl_dma_addr & (PAGE_SIZE - 1))) {
                 dev_err(hba->dev,
@@ -729,10 +697,10 @@ static int ufshcd_memory_alloc(struct ufs_hba *hba)
          * UFSHCI requires 1024 byte alignment of UTMRD
          */
         utmrdl_size = sizeof(struct utp_task_req_desc) * hba->nutmrs;
-        hba->utmrdl_base_addr = dma_alloc_coherent(hba->dev,
-                                                   utmrdl_size,
-                                                   &hba->utmrdl_dma_addr,
-                                                   GFP_KERNEL);
+        hba->utmrdl_base_addr = dmam_alloc_coherent(hba->dev,
+                                                    utmrdl_size,
+                                                    &hba->utmrdl_dma_addr,
+                                                    GFP_KERNEL);
         if (!hba->utmrdl_base_addr ||
             WARN_ON(hba->utmrdl_dma_addr & (PAGE_SIZE - 1))) {
                 dev_err(hba->dev,
@@ -741,14 +709,15 @@ static int ufshcd_memory_alloc(struct ufs_hba *hba)
         }
 
         /* Allocate memory for local reference block */
-        hba->lrb = kcalloc(hba->nutrs, sizeof(struct ufshcd_lrb), GFP_KERNEL);
+        hba->lrb = devm_kzalloc(hba->dev,
+                                hba->nutrs * sizeof(struct ufshcd_lrb),
+                                GFP_KERNEL);
         if (!hba->lrb) {
                 dev_err(hba->dev, "LRB Memory allocation failed\n");
                 goto out;
         }
         return 0;
 out:
-        ufshcd_free_hba_memory(hba);
         return -ENOMEM;
 }
 
@@ -1682,17 +1651,6 @@ int ufshcd_resume(struct ufs_hba *hba)
 EXPORT_SYMBOL_GPL(ufshcd_resume);
 
 /**
- * ufshcd_hba_free - free allocated memory for
- *                      host memory space data structures
- * @hba: per adapter instance
- */
-static void ufshcd_hba_free(struct ufs_hba *hba)
-{
-        iounmap(hba->mmio_base);
-        ufshcd_free_hba_memory(hba);
-}
-
-/**
  * ufshcd_remove - de-allocate SCSI host and host memory space
  *              data structure memory
  * @hba - per adapter instance
@@ -1701,9 +1659,7 @@ void ufshcd_remove(struct ufs_hba *hba)
 {
         /* disable interrupts */
         ufshcd_disable_intr(hba, hba->intr_mask);
-
         ufshcd_hba_stop(hba);
-        ufshcd_hba_free(hba);
 
         scsi_remove_host(hba->host);
         scsi_host_put(hba->host);
@@ -1789,23 +1745,23 @@ int ufshcd_init(struct device *dev, struct ufs_hba **hba_handle,
         mutex_init(&hba->uic_cmd_mutex);
 
         /* IRQ registration */
-        err = request_irq(irq, ufshcd_intr, IRQF_SHARED, UFSHCD, hba);
+        err = devm_request_irq(dev, irq, ufshcd_intr, IRQF_SHARED, UFSHCD, hba);
         if (err) {
                 dev_err(hba->dev, "request irq failed\n");
-                goto out_lrb_free;
+                goto out_disable;
         }
 
         /* Enable SCSI tag mapping */
         err = scsi_init_shared_tag_map(host, host->can_queue);
         if (err) {
                 dev_err(hba->dev, "init shared queue failed\n");
-                goto out_free_irq;
+                goto out_disable;
         }
 
         err = scsi_add_host(host, hba->dev);
         if (err) {
                 dev_err(hba->dev, "scsi_add_host failed\n");
-                goto out_free_irq;
+                goto out_disable;
         }
 
         /* Host controller enable */
@@ -1823,10 +1779,6 @@ int ufshcd_init(struct device *dev, struct ufs_hba **hba_handle,
 
 out_remove_scsi_host:
         scsi_remove_host(hba->host);
-out_free_irq:
-        free_irq(irq, hba);
-out_lrb_free:
-        ufshcd_free_hba_memory(hba);
 out_disable:
         scsi_host_put(host);
 out_error: