Merge tag 'mtd/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux

Pull MTD updates from Miquel Raynal:
 "This contains the following changes for MTD:

  MTD core changes:
   - New Hyperbus framework
   - New _is_locked (concat) implementation
   - Various cleanups

  NAND core changes:
   - use longest matching pattern in ->exec_op() default parser
   - export NAND operation tracer
   - add flag to indicate panic_write in MTD
   - use kzalloc() instead of kmalloc() and memset()

  Raw NAND controller drivers changes:
   - brcmnand:
       - fix BCH ECC layout for large page NAND parts
       - fallback to detected ecc-strength, ecc-step-size
       - when oops in progress use pio and interrupt polling
       - code refactor code to introduce helper functions
       - add support for v7.3 controller
   - FSMC:
       - use nand_op_trace for operation tracing
   - GPMI:
       - move all driver code into single file
       - various cleanups (including dmaengine changes)
       - use runtime PM to manage clocks
       - implement exec_op
   - MTK:
       - correct low level time calculation of r/w cycle
       - improve data sampling timing for read cycle
       - add validity check for CE# pin setting
       - fix wrongly assigned OOB buffer pointer issue
       - re-license MTK NAND driver as Dual MIT/GPL
   - STM32:
       - manage the get_irq error case
       - increase DMA completion timeouts

  Raw NAND chips drivers changes:
   - Macronix: add read-retry support

  Onenand driver changes:
   - add support for 8Gb datasize chips
   - avoid fall-through warnings

  SPI-NAND changes:
   - define macros for page-read ops with three-byte addresses
   - add support for two-byte device IDs and then for GigaDevice
     GD5F1GQ4UFxxG
   - add initial support for Paragon PN26G0xA
   - handle the case where the last page read has bitflips

  SPI-NOR core changes:
   - add support for the mt25ql02g and w25q16jv flashes
   - print error in case of jedec read id fails
   - is25lp256: add post BFPT fix to correct the addr_width

  SPI NOR controller drivers changes:
   - intel-spi: Add support for Intel Elkhart Lake SPI serial flash
   - smt32: remove the driver as the driver was replaced by spi-stm32-qspi.c
   - cadence-quadspi: add reset control"

* tag 'mtd/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: (60 commits)
  mtd: concat: implement _is_locked mtd operation
  mtd: concat: refactor concat_lock/concat_unlock
  mtd: abi: do not use C++ style comments in uapi header
  mtd: afs: remove unneeded NULL check
  mtd: rawnand: stm32_fmc2: increase DMA completion timeouts
  mtd: rawnand: Use kzalloc() instead of kmalloc() and memset()
  mtd: hyperbus: Add driver for TI's HyperBus memory controller
  mtd: spinand: read returns badly if the last page has bitflips
  mtd: spinand: Add initial support for Paragon PN26G0xA
  mtd: rawnand: mtk: Re-license MTK NAND driver as Dual MIT/GPL
  mtd: rawnand: gpmi: remove double assignment to block_size
  dt-bindings: mtd: brcmnand: Add brcmnand, brcmnand-v7.3 support
  mtd: rawnand: brcmnand: Add support for v7.3 controller
  mtd: rawnand: brcmnand: Refactored code to introduce helper functions
  mtd: rawnand: brcmnand: When oops in progress use pio and interrupt polling
  mtd: Add flag to indicate panic_write
  mtd: rawnand: Add Macronix NAND read retry support
  mtd: onenand: Avoid fall-through warnings
  mtd: spinand: Add support for GigaDevice GD5F1GQ4UFxxG
  mtd: spinand: Add support for two-byte device IDs
  ...

1 files changed, 20 insertions, 17 deletions

diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index 7324ff832b41..170a7221b35f 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -437,7 +437,8 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr)
         return err;
 }
 
-static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+static int concat_xxlock(struct mtd_info *mtd, loff_t ofs, uint64_t len,
+                         bool is_lock)
 {
         struct mtd_concat *concat = CONCAT(mtd);
         int i, err = -EINVAL;
@@ -456,7 +457,10 @@ static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
                 else
                         size = len;
 
-                err = mtd_lock(subdev, ofs, size);
+                if (is_lock)
+                        err = mtd_lock(subdev, ofs, size);
+                else
+                        err = mtd_unlock(subdev, ofs, size);
                 if (err)
                         break;
 
@@ -471,35 +475,33 @@ static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
         return err;
 }
 
+static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+        return concat_xxlock(mtd, ofs, len, true);
+}
+
 static int concat_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 {
+        return concat_xxlock(mtd, ofs, len, false);
+}
+
+static int concat_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
         struct mtd_concat *concat = CONCAT(mtd);
-        int i, err = 0;
+        int i, err = -EINVAL;
 
         for (i = 0; i < concat->num_subdev; i++) {
                 struct mtd_info *subdev = concat->subdev[i];
-                uint64_t size;
 
                 if (ofs >= subdev->size) {
-                        size = 0;
                         ofs -= subdev->size;
                         continue;
                 }
-                if (ofs + len > subdev->size)
-                        size = subdev->size - ofs;
-                else
-                        size = len;
-
-                err = mtd_unlock(subdev, ofs, size);
-                if (err)
-                        break;
 
-                len -= size;
-                if (len == 0)
+                if (ofs + len > subdev->size)
                         break;
 
-                err = -EINVAL;
-                ofs = 0;
+                return mtd_is_locked(subdev, ofs, len);
         }
 
         return err;
@@ -704,6 +706,7 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[],	/* subdevices to c
         concat->mtd._sync = concat_sync;
         concat->mtd._lock = concat_lock;
         concat->mtd._unlock = concat_unlock;
+        concat->mtd._is_locked = concat_is_locked;
         concat->mtd._suspend = concat_suspend;
         concat->mtd._resume = concat_resume;