[lkml]   [2018]   [Feb]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v2 1/2] net, can, ifi: fix "write buffer full" error
On 02/08/2018 03:46 PM, Marc Kleine-Budde wrote:
> On 02/08/2018 07:47 AM, Heiko Schocher wrote:
>> the driver reads in the ISR first the IRQpending register,
>> and clears after that in a write *all* bits in it.
>> It could happen that the isr register raise bits between
>> this 2 register accesses, which leads in lost bits ...
>> In case it clears "TX message sent successfully", the driver
>> never sends any Tx data, and buffers to userspace run over.
>> Fixed this:
>> clear only the bits in the IRQpending register, the
>> driver had read.
>> Signed-off-by: Heiko Schocher <>
>> Reviewed-by: Marek Vasut <>
> Applied both to linux-can.

Can you also apply them to stable, so they get into 4.9.x etc ?


Best regards,
Marek Vasut

 \ /
  Last update: 2018-02-08 21:10    [W:0.041 / U:19.376 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site