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From: Satya Tangirala <satyaprateek2357@gmail.com>
To: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>, Eric Biggers <ebiggers@google.com>,
	Satya Tangirala <satyaprateek2357@gmail.com>,
	Satya Tangirala <satyat@google.com>
Subject: [PATCH v4 6/9] mmc: handle error from blk_ksm_register()
Date: Tue,  6 Jul 2021 22:29:40 -0700	[thread overview]
Message-ID: <20210707052943.3960-7-satyaprateek2357@gmail.com> (raw)
In-Reply-To: <20210707052943.3960-1-satyaprateek2357@gmail.com>

From: Satya Tangirala <satyat@google.com>

Handle any error from blk_ksm_register() in the callers. Previously,
the callers ignored the return value because blk_ksm_register() wouldn't
fail as long as the request_queue didn't have integrity support too, but
as this is no longer the case, it's safer for the callers to just handle
the return value appropriately.

Signed-off-by: Satya Tangirala <satyat@google.com>
---
 drivers/mmc/core/crypto.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/core/crypto.c b/drivers/mmc/core/crypto.c
index 419a368f8402..c87be58a5548 100644
--- a/drivers/mmc/core/crypto.c
+++ b/drivers/mmc/core/crypto.c
@@ -21,8 +21,17 @@ void mmc_crypto_set_initial_state(struct mmc_host *host)
 
 void mmc_crypto_setup_queue(struct request_queue *q, struct mmc_host *host)
 {
-	if (host->caps2 & MMC_CAP2_CRYPTO)
-		blk_ksm_register(&host->ksm, q);
+	if (host->caps2 & MMC_CAP2_CRYPTO) {
+		/*
+		 * This WARN_ON should never trigger since &host->ksm won't be
+		 * "empty" (i.e. will support at least 1 crypto capability), an
+		 * MMC device's request queue doesn't support integrity, and all MMC
+		 * devices that currently support inline encryption also satisfy all the
+		 * block layer constraints (i.e. support SG gaps, don't have chunk
+		 * sectors, have a sufficiently large supported max_segments per bio)
+		 */
+		WARN_ON(!blk_ksm_register(&host->ksm, q));
+	}
 }
 EXPORT_SYMBOL_GPL(mmc_crypto_setup_queue);
 
-- 
2.25.1


  parent reply	other threads:[~2021-07-07  5:30 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-07  5:29 [PATCH v4 0/9] ensure bios aren't split in middle of crypto data unit Satya Tangirala
2021-07-07  5:29 ` [PATCH v4 1/9] block: introduce blk_ksm_is_empty() Satya Tangirala
2021-07-23 16:45   ` Eric Biggers
2021-07-07  5:29 ` [PATCH v4 2/9] block: blk-crypto: introduce blk_crypto_bio_sectors_alignment() Satya Tangirala
2021-07-23 16:45   ` Eric Biggers
2021-07-07  5:29 ` [PATCH v4 3/9] block: introduce bio_required_sector_alignment() Satya Tangirala
2021-07-23 16:46   ` Eric Biggers
2021-07-07  5:29 ` [PATCH v4 4/9] block: keyslot-manager: introduce blk_ksm_restrict_dus_to_queue_limits() Satya Tangirala
2021-07-23 17:08   ` Eric Biggers
2021-07-07  5:29 ` [PATCH v4 5/9] ufshcd: handle error from blk_ksm_register() Satya Tangirala
2021-07-23 17:13   ` Eric Biggers
2021-07-07  5:29 ` Satya Tangirala [this message]
2021-07-07  5:29 ` [PATCH v4 7/9] dm: " Satya Tangirala
2021-07-23 17:26   ` Eric Biggers
2021-07-07  5:29 ` [PATCH v4 8/9] blk-merge: Ensure bios aren't split in middle of a crypto data unit Satya Tangirala
2021-07-23 18:11   ` Eric Biggers
2021-07-07  5:29 ` [PATCH v4 9/9] block: add WARN_ON_ONCE() to bio_split() for sector alignment Satya Tangirala
2021-07-23 17:30   ` Eric Biggers
2021-07-23 16:49 ` [PATCH v4 0/9] ensure bios aren't split in middle of crypto data unit Eric Biggers
2021-07-23 17:52   ` Eric Biggers
2021-07-24  7:36 ` Christoph Hellwig

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