From: Tom Yan Date: Thu, 14 Jul 2016 21:09:02 +0000 (+0800) Subject: ata: make lba_{28,48}_ok() use ATA_MAX_SECTORS{,_LBA48} X-Git-Tag: v4.14-rc1~2839^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=35303d5c36415754680f953aa6128b8b907d0543;p=platform%2Fkernel%2Flinux-rpi.git ata: make lba_{28,48}_ok() use ATA_MAX_SECTORS{,_LBA48} Since we set ATA_MAX_SECTORS_LBA48 to 65535 to avoid the corner case in some drives that commands with "count" set to 0000h (which reprsents 65536) does not work as expected, lba_48_ok(), which is used for number-of-blocks checking when libata pack commands, should use the same limit as well. In fact, there is no reason for the two functions not to use the macros anyway. Signed-off-by: Tom Yan Signed-off-by: Tejun Heo --- diff --git a/include/linux/ata.h b/include/linux/ata.h index 35857d1..5b67ff4 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -46,7 +46,7 @@ enum { ATA_MAX_SECTORS_128 = 128, ATA_MAX_SECTORS = 256, ATA_MAX_SECTORS_1024 = 1024, - ATA_MAX_SECTORS_LBA48 = 65535,/* TODO: 65536? */ + ATA_MAX_SECTORS_LBA48 = 65535,/* avoid count to be 0000h */ ATA_MAX_SECTORS_TAPE = 65535, ATA_MAX_TRIM_RNUM = 64, /* 512-byte payload / (6-byte LBA + 2-byte range per entry) */ @@ -1100,13 +1100,13 @@ static inline bool ata_ok(u8 status) static inline bool lba_28_ok(u64 block, u32 n_block) { /* check the ending block number: must be LESS THAN 0x0fffffff */ - return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256); + return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= ATA_MAX_SECTORS); } static inline bool lba_48_ok(u64 block, u32 n_block) { /* check the ending block number */ - return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536); + return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= ATA_MAX_SECTORS_LBA48); } #define sata_pmp_gscr_vendor(gscr) ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)