[SCSI] qla2xxx: Handle unaligned sector writes during NVRAM/VPD updates.

Since both NVRAM and VPD regions of the flash reside on unaligned
sector boundaries, during update, the driver must perform a
read-modify-write operation to the composite NVRAM/VPD region.
This affects ISP25xx type boards only.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 21 insertions, 8 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 05fa7796a559..2f0bd5abb9ac 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -114,7 +114,6 @@ qla2x00_sysfs_write_nvram(struct kobject *kobj,
 {
         struct scsi_qla_host *ha = shost_priv(dev_to_shost(container_of(kobj,
             struct device, kobj)));
-        unsigned long   flags;
         uint16_t        cnt;
 
         if (!capable(CAP_SYS_ADMIN) || off != 0 || count != ha->nvram_size)
@@ -144,11 +143,9 @@ qla2x00_sysfs_write_nvram(struct kobject *kobj,
         }
 
         /* Write NVRAM. */
-        spin_lock_irqsave(&ha->hardware_lock, flags);
         ha->isp_ops->write_nvram(ha, (uint8_t *)buf, ha->nvram_base, count);
         ha->isp_ops->read_nvram(ha, (uint8_t *)ha->nvram, ha->nvram_base,
             count);
-        spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 
@@ -397,16 +394,13 @@ qla2x00_sysfs_write_vpd(struct kobject *kobj,
 {
         struct scsi_qla_host *ha = shost_priv(dev_to_shost(container_of(kobj,
             struct device, kobj)));
-        unsigned long flags;
 
         if (!capable(CAP_SYS_ADMIN) || off != 0 || count != ha->vpd_size)
                 return 0;
 
         /* Write NVRAM. */
-        spin_lock_irqsave(&ha->hardware_lock, flags);
         ha->isp_ops->write_nvram(ha, (uint8_t *)buf, ha->vpd_base, count);
         ha->isp_ops->read_nvram(ha, (uint8_t *)ha->vpd, ha->vpd_base, count);
-        spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
         return count;
 }
diff --git a/drivers/scsi/qla2xxx/qla_sup.c b/drivers/scsi/qla2xxx/qla_sup.c
index 6670ad585f28..c24f3d9dea76 100644
--- a/drivers/scsi/qla2xxx/qla_sup.c
+++ b/drivers/scsi/qla2xxx/qla_sup.c
@@ -7,6 +7,7 @@
 #include "qla_def.h"
 
 #include <linux/delay.h>
+#include <linux/vmalloc.h>
 #include <asm/uaccess.h>
 
 static uint16_t qla2x00_nvram_request(scsi_qla_host_t *, uint32_t);
@@ -745,9 +746,11 @@ qla2x00_write_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
         int ret, stat;
         uint32_t i;
         uint16_t *wptr;
+        unsigned long flags;
 
         ret = QLA_SUCCESS;
 
+        spin_lock_irqsave(&ha->hardware_lock, flags);
         qla2x00_lock_nvram_access(ha);
 
         /* Disable NVRAM write-protection. */
@@ -764,6 +767,7 @@ qla2x00_write_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
         qla2x00_set_nvram_protection(ha, stat);
 
         qla2x00_unlock_nvram_access(ha);
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
         return ret;
 }
@@ -776,9 +780,11 @@ qla24xx_write_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
         uint32_t i;
         uint32_t *dwptr;
         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
+        unsigned long flags;
 
         ret = QLA_SUCCESS;
 
+        spin_lock_irqsave(&ha->hardware_lock, flags);
         /* Enable flash write. */
         WRT_REG_DWORD(&reg->ctrl_status,
             RD_REG_DWORD(&reg->ctrl_status) | CSRX_FLASH_ENABLE);
@@ -812,6 +818,7 @@ qla24xx_write_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
         WRT_REG_DWORD(&reg->ctrl_status,
             RD_REG_DWORD(&reg->ctrl_status) & ~CSRX_FLASH_ENABLE);
         RD_REG_DWORD(&reg->ctrl_status);        /* PCI Posting. */
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
         return ret;
 }
@@ -836,8 +843,20 @@ int
 qla25xx_write_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
     uint32_t bytes)
 {
-        return qla24xx_write_flash_data(ha, (uint32_t *)buf,
-            FA_VPD_NVRAM_ADDR | naddr, bytes >> 2);
+#define RMW_BUFFER_SIZE (64 * 1024)
+        uint8_t *dbuf;
+
+        dbuf = vmalloc(RMW_BUFFER_SIZE);
+        if (!dbuf)
+                return QLA_MEMORY_ALLOC_FAILED;
+        ha->isp_ops->read_optrom(ha, dbuf, FA_VPD_NVRAM_ADDR << 2,
+            RMW_BUFFER_SIZE);
+        memcpy(dbuf + (naddr << 2), buf, bytes);
+        ha->isp_ops->write_optrom(ha, dbuf, FA_VPD_NVRAM_ADDR << 2,
+            RMW_BUFFER_SIZE);
+        vfree(dbuf);
+
+        return QLA_SUCCESS;
 }
 
 static inline void