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Wed, 07 May 2025 05:19:32 -0700 (PDT) Received: from demon-pc.localdomain ([188.27.128.5]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5fa777557b9sm9350002a12.10.2025.05.07.05.19.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 May 2025 05:19:32 -0700 (PDT) From: Cosmin Tanislav <demonsingur@gmail.com> To: Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>, Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>, Luca Ceresoli <luca.ceresoli@bootlin.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, Romain Gantois <romain.gantois@bootlin.com>, Arnd Bergmann <arnd@arndb.de>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, Cosmin Tanislav <demonsingur@gmail.com> Subject: [PATCH v5 6/9] i2c: atr: allow replacing mappings in attach_addr() Date: Wed, 7 May 2025 15:19:12 +0300 Message-ID: <20250507121917.2364416-7-demonsingur@gmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250507121917.2364416-1-demonsingur@gmail.com> References: <20250507121917.2364416-1-demonsingur@gmail.com> Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: <linux-i2c.vger.kernel.org> List-Subscribe: <mailto:linux-i2c+subscribe@vger.kernel.org> List-Unsubscribe: <mailto:linux-i2c+unsubscribe@vger.kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit |
Series |
i2c: atr: allow usage of nested ATRs
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diff --git a/drivers/i2c/i2c-atr.c b/drivers/i2c/i2c-atr.c index ae5c2ee629f0..91aabfb4379b 100644 --- a/drivers/i2c/i2c-atr.c +++ b/drivers/i2c/i2c-atr.c @@ -543,6 +543,9 @@ static int i2c_atr_attach_addr(struct i2c_adapter *adapter, mutex_lock(&chan->alias_pairs_lock); c2a = i2c_atr_create_mapping_by_addr(chan, addr); + if (!c2a) + c2a = i2c_atr_replace_mapping_by_addr(chan, addr); + if (!c2a) { dev_err(atr->dev, "failed to find a free alias\n"); ret = -EBUSY;
It is possible for aliases to be exhausted while we are still attaching children. Allow replacing mapping on attach by calling i2c_atr_replace_mapping_by_addr() if i2c_atr_create_mapping_by_addr() fails. Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com> --- drivers/i2c/i2c-atr.c | 3 +++ 1 file changed, 3 insertions(+)