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authorChris Packham <chris.packham@alliedtelesis.co.nz>2019-05-22 12:06:28 +1200
committerMiquel Raynal <miquel.raynal@bootlin.com>2019-06-27 19:47:31 +0200
commit99a125f8edec391e423962847c6fd1d6994f0ad8 (patch)
tree0708fc1d567837a0865e757d34f60f6c16da4962 /drivers/mtd/chips
parenta188339ca5a396acc588e5851ed7e19f66b0ebd9 (diff)
downloadlinux-99a125f8edec391e423962847c6fd1d6994f0ad8.tar.bz2
mtd: cfi_cmdset_0002: dynamically determine the max sectors
Because PPB unlocking unlocks the whole chip cfi_ppb_unlock() needs to remember the locked status for each sector so it can re-lock the unaddressed sectors. Dynamically calculate the maximum number of sectors rather than using a hardcoded value that is too small for larger chips. Tested with Spansion S29GL01GS11TFI flash device. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Reviewed-by: Stefan Roese <sr@denx.de> Acked-by: Vignesh Raghavendra <vigneshr@ti.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Diffstat (limited to 'drivers/mtd/chips')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index c8fa5906bdf9..a1a7d334aa82 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -2533,8 +2533,6 @@ struct ppb_lock {
int locked;
};
-#define MAX_SECTORS 512
-
#define DO_XXLOCK_ONEBLOCK_LOCK ((void *)1)
#define DO_XXLOCK_ONEBLOCK_UNLOCK ((void *)2)
#define DO_XXLOCK_ONEBLOCK_GETLOCK ((void *)3)
@@ -2633,6 +2631,7 @@ static int __maybe_unused cfi_ppb_unlock(struct mtd_info *mtd, loff_t ofs,
int i;
int sectors;
int ret;
+ int max_sectors;
/*
* PPB unlocking always unlocks all sectors of the flash chip.
@@ -2640,7 +2639,11 @@ static int __maybe_unused cfi_ppb_unlock(struct mtd_info *mtd, loff_t ofs,
* first check the locking status of all sectors and save
* it for future use.
*/
- sect = kcalloc(MAX_SECTORS, sizeof(struct ppb_lock), GFP_KERNEL);
+ max_sectors = 0;
+ for (i = 0; i < mtd->numeraseregions; i++)
+ max_sectors += regions[i].numblocks;
+
+ sect = kcalloc(max_sectors, sizeof(struct ppb_lock), GFP_KERNEL);
if (!sect)
return -ENOMEM;
@@ -2689,9 +2692,9 @@ static int __maybe_unused cfi_ppb_unlock(struct mtd_info *mtd, loff_t ofs,
}
sectors++;
- if (sectors >= MAX_SECTORS) {
+ if (sectors >= max_sectors) {
printk(KERN_ERR "Only %d sectors for PPB locking supported!\n",
- MAX_SECTORS);
+ max_sectors);
kfree(sect);
return -EINVAL;
}