[PATCH v2 13/18] mtd: ssfdc: Replace open-coded parity calculation with parity32()
Kuan-Wei Chiu <[email protected]>
| Newsgroups | dev.linux.lists.brcm80211,org.freedesktop.lists.dri-devel,org.infradead.lists.linux-mtd,org.kernel.vger.bpf,org.kernel.vger.linux-input,org.kernel.vger.linux-kernel,org.kernel.vger.linux-media,org.kernel.vger.linux-serial,org.kernel.vger.linux-wireless,org.kernel.vger.netdev |
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| Message-ID | <[email protected]> |
Refactor parity calculations to use the standard parity32() helper. This change eliminates redundant implementations and improves code efficiency. Co-developed-by: Yu-Chun Lin <[email protected]> Signed-off-by: Yu-Chun Lin <[email protected]> Signed-off-by: Kuan-Wei Chiu <[email protected]> --- drivers/mtd/ssfdc.c | 17 ++--------------- 1 file changed, 2 insertions(+), 15 deletions(-) diff --git a/drivers/mtd/ssfdc.c b/drivers/mtd/ssfdc.c index 46c01fa2ec46..e7f9e73da644 100644 --- a/drivers/mtd/ssfdc.c +++ b/drivers/mtd/ssfdc.c @@ -7,6 +7,7 @@ * Based on NTFL and MTDBLOCK_RO drivers */ +#include <linux/bitops.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> @@ -178,20 +179,6 @@ static int read_raw_oob(struct mtd_info *mtd, loff_t offs, uint8_t *buf) return 0; } -/* Parity calculator on a word of n bit size */ -static int get_parity(int number, int size) -{ - int k; - int parity; - - parity = 1; - for (k = 0; k < size; k++) { - parity += (number >> k); - parity &= 1; - } - return parity; -} - /* Read and validate the logical block address field stored in the OOB */ static int get_logical_address(uint8_t *oob_buf) { @@ -215,7 +202,7 @@ static int get_logical_address(uint8_t *oob_buf) block_address &= 0x7FF; block_address >>= 1; - if (get_parity(block_address, 10) != parity) { + if (parity32(block_address & 0x3ff) == parity) { pr_debug("SSFDC_RO: logical address field%d" "parity error(0x%04X)\n", j+1, block_address); -- 2.34.1