Joakim,

On Thu, Mar 1, 2018 at 2:39 PM, Joakim Tjernlund joakim.tjernlund@infinera.com wrote:

From: Joakim Tjernlund joakim.tjernlund@transmode.se

Some Micron chips does not work well wrt Erase suspend for boot blocks. This avoids the issue by not allowing Erase suspend for the boot blocks for the 28F00AP30(1GBit) chip.

Is this bug documented somewhere?

Signed-off-by: Joakim Tjernlund joakim.tjernlund@infinera.com Cc: stable@vger.kernel.org

---

drivers/mtd/chips/cfi_cmdset_0001.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index b59872304ae7..64ae65dab877 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -45,6 +45,7 @@ #define I82802AB 0x00ad #define I82802AC 0x00ac #define PF38F4476 0x881c +#define M28F00AP30 0x8963 /* STMicroelectronics chips */ #define M50LPW080 0x002F #define M50FLW080A 0x0080 @@ -375,6 +376,17 @@ static void cfi_fixup_major_minor(struct cfi_private *cfi, extp->MinorVersion = '1'; }

+static int cfi_is_micron_28F00AP30(struct cfi_private *cfi, struct flchip *chip) +{

•   /*
  

•    * Micron(was Numonyx) 1Gbit bottom boot are buggy w.r.t
  

•    * Erase Supend for their small Erase Blocks(0x8000)
  

•    */
  

•   if (cfi->mfr == CFI_MFR_INTEL && cfi->id == M28F00AP30)
  

•           return 1;
  

•   return 0;
  

+}

static inline struct cfi_pri_intelext * read_pri_intelext(struct map_info *map, __u16 adr) { @@ -854,6 +866,11 @@ static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long chip->in_progress_block_addr) goto sleep;

•           /* do not suspend small EBs, buggy Micron Chips */
  

•           if (cfi_is_micron_28F00AP30(cfi, chip) &&
  

•               (chip->in_progress_block_mask == ~(0x8000-1)))
  

•                   goto sleep;
  

•           /* Erase suspend */
            map_write(map, CMD(0xB0), chip->in_progress_block_addr);
  
  

-- 2.13.6

---

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