Messages in this thread | | | Date | Mon, 28 Jul 2014 22:37:18 +0530 | Subject | Re: [PATCH] input: ads7846: Switch to managed version of kzalloc and cleanups | From | Pramod Gurav <> |
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Thanks Dmitry for reviewing.
On Mon, Jul 28, 2014 at 10:19 PM, Dmitry Torokhov <dmitry.torokhov@gmail.com> wrote: > Hi Pramod, > > On Mon, Jul 28, 2014 at 02:16:55PM +0530, pramod.gurav.etc@gmail.com wrote: >> From: Pramod Gurav <pramod.gurav@smartplayin.com> >> >> This switches memory allocations from kzalloc to devm_kzalloc. >> This also changes the way return checks were done on failure cases >> of three allocations. The checks were clubbed together and hence >> must be done seperately to avoid calling kfree on unallocated memory. >> >> Moreover in case of input_allocate_device failure, we were calling >> input_free_device which is not needed. > > But not hurting either - like kfree() and many other "cleanup" functions > in kernel they are happily accept NULL input (so that cleanup code is > less branchy). >> Great. Good to learn. >> input device must be released(input_free_device) when ads7846_probe_dt >> fails hence adds a fix there as well. > > That is the real bug, could you send me a patch that fixes just that (by > jumping to err_free_mem)? Sure I will.
> > The rest I'd like to leave as is unless you can convert _all_ resources > to be managed ones: mixing up 2 styles (manual and automatic release) is > bound to have issues (like we had with ads7846_probe_dt which assumed > that since it was releasing its resources automatically the rest would > be released automatically as well.
I thought I would use a managed input_device allocation in a separate patch. I will convert all allocations to managed then.
This driver also registers a irq. You suggest to convert it to managed as well? I was planning to do that? > > Thanks. > > -- > Dmitry
-- Thanks and Regards Pramod
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