From: Jungseung Lee <js07.lee@samsung.com>
To: Ulf Hansson <ulf.hansson@linaro.org>,
Christoph Hellwig <hch@lst.de>,
js07.lee@gmail.com, linux-mmc@vger.kernel.org
Cc: Jungseung Lee <js07.lee@samsung.com>
Subject: [PATCH 1/2] mmc : Add unmmapped zero quirk flag
Date: Tue, 07 Nov 2017 16:02:58 +0900 [thread overview]
Message-ID: <20171107070259.11664-1-js07.lee@samsung.com> (raw)
In-Reply-To: CGME20171107070318eucas1p18f1f745136c9cea51468a20004a55666@eucas1p1.samsung.com
Some devices return zeroes on read to unmmaped logical blocks.
This patch adds a flag to the mmc quirk list for the devices work that way.
Signed-off-by: Jungseung Lee <js07.lee@samsung.com>
---
include/linux/mmc/card.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 279b390..f032cb0 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -268,6 +268,7 @@ struct mmc_card {
#define MMC_QUIRK_BROKEN_IRQ_POLLING (1<<11) /* Polling SDIO_CCCR_INTx could create a fake interrupt */
#define MMC_QUIRK_TRIM_BROKEN (1<<12) /* Skip trim */
#define MMC_QUIRK_BROKEN_HPI (1<<13) /* Disable broken HPI support */
+#define MMC_QUIRK_UNMAPPED_ZEROES (1<<14) /* Return 0's on read to unmmaped logical blocks */
bool reenable_cmdq; /* Re-enable Command Queue */
--
2.10.1
next parent reply other threads:[~2017-11-07 7:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20171107070318eucas1p18f1f745136c9cea51468a20004a55666@eucas1p1.samsung.com>
2017-11-07 7:02 ` Jungseung Lee [this message]
2017-11-07 7:02 ` [PATCH 2/2] mmc : implement REQ_OP_WRITE_ZEROES Jungseung Lee
2017-11-07 7:10 ` Christoph Hellwig
2017-11-07 12:54 ` Ulf Hansson
2017-11-08 14:25 ` Jungseung Lee
2017-11-09 12:33 ` Ulf Hansson
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