kernel/drivers/slimbus/qcom-ctrl.c, branch linux-rolling-stable

slimbus: qcom: remove unused qcom controller driver

2025-09-12T13:47:37Z

Qcom Slimbus controller driver is totally unused and dead code, there is no point in keeping this driver in the kernel without users. This patch removes the driver along with device tree bindings. Signed-off-by: Srinivas Kandagatla Acked-by: Rob Herring (Arm) Acked-by: Dmitry Baryshkov Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20250912131202.303026-2-srini@kernel.org Signed-off-by: Greg Kroah-Hartman

Get rid of 'remove_new' relic from platform driver struct

2024-12-01T23:12:43Z

The continual trickle of small conversion patches is grating on me, and is really not helping. Just get rid of the 'remove_new' member function, which is just an alias for the plain 'remove', and had a comment to that effect: /* * .remove_new() is a relic from a prototype conversion of .remove(). * New drivers are supposed to implement .remove(). Once all drivers are * converted to not use .remove_new any more, it will be dropped. */ This was just a tree-wide 'sed' script that replaced '.remove_new' with '.remove', with some care taken to turn a subsequent tab into two tabs to make things line up. I did do some minimal manual whitespace adjustment for places that used spaces to line things up. Then I just removed the old (sic) .remove_new member function, and this is the end result. No more unnecessary conversion noise. Signed-off-by: Linus Torvalds

slimbus: qcom-ctrl: use 'time_left' variable with wait_for_completion_timeout()

2024-09-03T10:10:38Z

There is a confusing pattern in the kernel to use a variable named 'timeout' to store the result of wait_for_completion_timeout() causing patterns like: timeout = wait_for_completion_timeout(...) if (!timeout) return -ETIMEDOUT; with all kinds of permutations. Use 'time_left' as a variable to make the code self explaining. Fix to the proper variable type 'unsigned long' while here. Signed-off-by: Wolfram Sang Signed-off-by: Srinivas Kandagatla Reviewed-by: Bjorn Andersson Link: https://lore.kernel.org/r/20240902141004.70048-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

slimbus: qcom-ctrl: fix module autoloading

2024-05-03T05:28:16Z

Add MODULE_DEVICE_TABLE(), so the module could be properly autoloaded based on the alias from of_device_id table. Pin controllers are considered core components, so usually they are built-in, however these Signed-off-by: Krzysztof Kozlowski Reviewed-by: Konrad Dybcio Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20240430091657.35428-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

slimbus: Convert to platform remove callback returning void

2024-05-03T05:28:16Z

The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert the slimbus drivers from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20240430091657.35428-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

slimbus: qcom-ctrl: use devm_platform_ioremap_resource_byname()

2022-11-23T18:45:33Z

Simplify the code with devm_platform_ioremap_resource_byname(). Signed-off-by: Krzysztof Kozlowski Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20221118065246.6835-8-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

slimbus: qcom-ctrl: drop unneeded qcom,apq8064-slim compatible

2022-11-23T18:45:33Z

Bindings require usage of fallback "qcom,slim" compatible, so "qcom,apq8064-slim" is redundant. Signed-off-by: Krzysztof Kozlowski Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20221118065246.6835-7-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

slimbus: qcom: Remove unnecessary print function dev_err()

2022-05-19T16:56:32Z

The print function dev_err() is redundant because platform_get_irq_byname() already prints an error. Eliminate the follow coccicheck warning: ./drivers/slimbus/qcom-ctrl.c:514:2-9: line 514 is redundant because platform_get_irq() already prints an error Reported-by: Abaci Robot Signed-off-by: Yang Li Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20220510095205.337-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

slimbus: qcom: Fix IRQ check in qcom_slim_probe

2022-05-19T16:56:32Z

platform_get_irq() returns non-zero IRQ number on success, negative error number on failure. And the doc of platform_get_irq() provides a usage example: int irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; Fix the check of return value to catch errors correctly. Fixes: ad7fcbc308b0 ("slimbus: qcom: Add Qualcomm Slimbus controller driver") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20220510095205.337-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

slimbus: qcom: fix potential NULL dereference in qcom_slim_prg_slew()

2020-12-10T15:23:56Z

platform_get_resource_byname() may fail and in this case a NULL dereference will occur. Fix it to use devm_platform_ioremap_resource_byname() instead of calling platform_get_resource_byname() and devm_ioremap(). This is detected by Coccinelle semantic patch. @@ expression pdev, res, n, t, e, e1, e2; @@ res = \(platform_get_resource\|platform_get_resource_byname\)(pdev, t, n); + if (!res) + return -EINVAL; ... when != res == NULL e = devm_ioremap(e1, res->start, e2); Fixes: ad7fcbc308b0 ("slimbus: qcom: Add Qualcomm Slimbus controller driver") Signed-off-by: Zhang Changzhong Link: https://lore.kernel.org/r/1607392473-20610-1-git-send-email-zhangchangzhong@huawei.com Signed-off-by: Greg Kroah-Hartman