From: YouChing Lin <ycllin@mxic.com.tw> To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, juliensu@mxic.com.tw, YouChing Lin <ycllin@mxic.com.tw> Subject: [PATCH 2/2] mtd: nand: ecc-hamming: Fix the double counting of ECC stat Date: Tue, 11 May 2021 09:40:35 +0800 [thread overview] Message-ID: <1620697235-7829-3-git-send-email-ycllin@mxic.com.tw> (raw) In-Reply-To: <1620697235-7829-1-git-send-email-ycllin@mxic.com.tw> If you use SPI-NAND with SW-ECC engine, the ECC related statistics (ecc_stats.failed & ecc_stats.corrected) will be doubled, because those numbers will be double-counted in ecc-sw-hamming.c and drivers/mtd/nand/spi/core.c. This can be found by using nandtest/nandbiterrs validation. Signed-off-by: YouChing Lin <ycllin@mxic.com.tw> --- drivers/mtd/nand/ecc-sw-hamming.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/nand/ecc-sw-hamming.c b/drivers/mtd/nand/ecc-sw-hamming.c index a7655b6..e8a30cf 100644 --- a/drivers/mtd/nand/ecc-sw-hamming.c +++ b/drivers/mtd/nand/ecc-sw-hamming.c @@ -625,11 +625,12 @@ static int nand_ecc_sw_hamming_finish_io_req(struct nand_device *nand, &ecccode[i], &ecccalc[i]); if (stat < 0) { - mtd->ecc_stats.failed++; - } else { - mtd->ecc_stats.corrected += stat; - max_bitflips = max_t(unsigned int, max_bitflips, stat); + nand_ecc_restore_req(&engine_conf->req_ctx, req); + + return -EBADMSG; } + + max_bitflips = max_t(unsigned int, max_bitflips, stat); } nand_ecc_restore_req(&engine_conf->req_ctx, req); -- 1.9.1
WARNING: multiple messages have this Message-ID (diff)
From: YouChing Lin <ycllin@mxic.com.tw> To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, juliensu@mxic.com.tw, YouChing Lin <ycllin@mxic.com.tw> Subject: [PATCH 2/2] mtd: nand: ecc-hamming: Fix the double counting of ECC stat Date: Tue, 11 May 2021 09:40:35 +0800 [thread overview] Message-ID: <1620697235-7829-3-git-send-email-ycllin@mxic.com.tw> (raw) In-Reply-To: <1620697235-7829-1-git-send-email-ycllin@mxic.com.tw> If you use SPI-NAND with SW-ECC engine, the ECC related statistics (ecc_stats.failed & ecc_stats.corrected) will be doubled, because those numbers will be double-counted in ecc-sw-hamming.c and drivers/mtd/nand/spi/core.c. This can be found by using nandtest/nandbiterrs validation. Signed-off-by: YouChing Lin <ycllin@mxic.com.tw> --- drivers/mtd/nand/ecc-sw-hamming.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/nand/ecc-sw-hamming.c b/drivers/mtd/nand/ecc-sw-hamming.c index a7655b6..e8a30cf 100644 --- a/drivers/mtd/nand/ecc-sw-hamming.c +++ b/drivers/mtd/nand/ecc-sw-hamming.c @@ -625,11 +625,12 @@ static int nand_ecc_sw_hamming_finish_io_req(struct nand_device *nand, &ecccode[i], &ecccalc[i]); if (stat < 0) { - mtd->ecc_stats.failed++; - } else { - mtd->ecc_stats.corrected += stat; - max_bitflips = max_t(unsigned int, max_bitflips, stat); + nand_ecc_restore_req(&engine_conf->req_ctx, req); + + return -EBADMSG; } + + max_bitflips = max_t(unsigned int, max_bitflips, stat); } nand_ecc_restore_req(&engine_conf->req_ctx, req); -- 1.9.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/
next prev parent reply other threads:[~2021-05-11 2:17 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-11 1:40 [PATCH 0/2] Fix double counting of S/W ECC engines' ECC stat YouChing Lin 2021-05-11 1:40 ` YouChing Lin 2021-05-11 1:40 ` [PATCH 1/2] mtd: nand: ecc-bch: Fix the double counting of " YouChing Lin 2021-05-11 1:40 ` YouChing Lin 2021-05-11 1:40 ` YouChing Lin [this message] 2021-05-11 1:40 ` [PATCH 2/2] mtd: nand: ecc-hamming: " YouChing Lin 2021-05-11 8:53 ` [PATCH 0/2] Fix double counting of S/W ECC engines' " Miquel Raynal 2021-05-11 8:53 ` Miquel Raynal 2021-05-13 2:11 ` ycllin 2021-05-13 2:11 ` ycllin 2021-05-13 6:45 ` Miquel Raynal 2021-05-13 6:45 ` Miquel Raynal 2021-05-20 10:56 ` ycllin 2021-05-20 10:56 ` ycllin
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