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From: peda@axentia.se (Peter Rosin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 06/11] media: drxk_hard: switch to i2c_lock_segment
Date: Fri, 15 Jun 2018 12:15:01 +0200	[thread overview]
Message-ID: <20180615101506.8012-7-peda@axentia.se> (raw)
In-Reply-To: <20180615101506.8012-1-peda@axentia.se>

Locking the root adapter for __i2c_transfer will deadlock if the
device sits behind a mux-locked I2C mux. Switch to the finer-grained
i2c_lock_segment. If the device does not sit behind a mux-locked mux,
the two locking variants are equivalent.

Signed-off-by: Peter Rosin <peda@axentia.se>
---
 drivers/media/dvb-frontends/drxk_hard.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/dvb-frontends/drxk_hard.c b/drivers/media/dvb-frontends/drxk_hard.c
index 5a26ad93be10..10e6bb158712 100644
--- a/drivers/media/dvb-frontends/drxk_hard.c
+++ b/drivers/media/dvb-frontends/drxk_hard.c
@@ -213,7 +213,7 @@ static inline u32 log10times100(u32 value)
 
 static int drxk_i2c_lock(struct drxk_state *state)
 {
-	i2c_lock_adapter(state->i2c);
+	i2c_lock_segment(state->i2c);
 	state->drxk_i2c_exclusive_lock = true;
 
 	return 0;
@@ -224,7 +224,7 @@ static void drxk_i2c_unlock(struct drxk_state *state)
 	if (!state->drxk_i2c_exclusive_lock)
 		return;
 
-	i2c_unlock_adapter(state->i2c);
+	i2c_unlock_segment(state->i2c);
 	state->drxk_i2c_exclusive_lock = false;
 }
 
-- 
2.11.0

  parent reply	other threads:[~2018-06-15 10:15 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-15 10:14 [PATCH 00/11] Split i2c_lock_adapter into i2c_lock_root and i2c_lock_segment Peter Rosin
2018-06-15 10:14 ` [PATCH 01/11] i2c: add helpers for locking the I2C segment Peter Rosin
2018-06-18 11:05   ` Wolfram Sang
2018-06-18 11:32     ` Peter Rosin
2018-06-18 11:54       ` Wolfram Sang
2018-06-19 21:29         ` Peter Rosin
2018-06-15 10:14 ` [PATCH 02/11] tpm/tpm_i2c_infineon: switch to i2c_lock_segment Peter Rosin
2018-06-19 12:56   ` Jarkko Sakkinen
2018-06-19 13:05     ` Peter Rosin
2018-06-15 10:14 ` [PATCH 03/11] i2c: mux: pca9541: " Peter Rosin
2018-06-15 10:14 ` [PATCH 04/11] input: rohm_bu21023: " Peter Rosin
2018-06-19 18:40   ` Dmitry Torokhov
2018-06-15 10:15 ` [PATCH 05/11] media: af9013: " Peter Rosin
2018-06-15 10:15 ` Peter Rosin [this message]
2018-06-15 10:15 ` [PATCH 07/11] media: rtl2830: " Peter Rosin
2018-06-15 10:15 ` [PATCH 08/11] media: tda1004x: " Peter Rosin
2018-06-15 10:15 ` [PATCH 09/11] media: tda18271: " Peter Rosin
2018-06-15 10:15 ` [PATCH 10/11] mfd: 88pm860x-i2c: " Peter Rosin
2018-06-15 10:15 ` [PATCH 11/11] i2c: rename i2c_lock_adapter to i2c_lock_root Peter Rosin
2018-06-18 11:06 ` [PATCH 00/11] Split i2c_lock_adapter into i2c_lock_root and i2c_lock_segment Wolfram Sang

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