From: Suniel Mahesh <sunil.m@xxxxxxxxxxxx> Hi This patch series replaces the current API's which request for device resources in driver probe, with devm_*() functions of the kernel framework as recommended by the kernel community. Doing so simplifies driver cleanup paths and code organization. The current set of API's whch request for device resources are not device managed. The devm_*() functions of the kernel framework are kernel managed resources which the kernel tracks and then automatically releases them when the device goes away. Patch 1/3, replaces kzalloc with devm_kzalloc, kfree's and blank lines are removed accordingly. Patch 2/3, utilizes devm_ioremap_resource for map and unmap of device resources. request_mem_region(), ioremap() and corresponding error handling is replaced with devm_ioremap_resource(). release_mem_region() and iounmap() are dropped. A struct member in struct ssi_drvdata is dropped as it seemed redundant. Log messages adjusted accordingly. Patch 3/3, replaces platform_get_resource(), request_irq() and corresponding error handling with platform_get_irq() and devm_request_irq(). free_irq is not required any more, devm_request_irq() free's it on driver detach. A struct member in struct ssi_drvdata and a bool variable in driver probe are dropped as they seemed redundant. Changed type of a member in struct ssi_drvdata to use it with platform_get_irq(). Log messages adjusted accordingly. Note: Patch was tested and built(ARCH=arm) on next-20170714. No build issues reported, however it was not tested on real hardware. Please drop any patch if they break the flow. As per my analysis these changes should not create a problem. Thanks, Suniel Suniel Mahesh (3): staging: ccree: Replace kzalloc with devm_kzalloc staging: ccree: Convert to devm_ioremap_resource for map, unmap staging: ccree: Use platform_get_irq and devm_request_irq drivers/staging/ccree/ssi_driver.c | 92 +++++++++++--------------------------- drivers/staging/ccree/ssi_driver.h | 4 +- 2 files changed, 26 insertions(+), 70 deletions(-) -- 1.9.1
