From mboxrd@z Thu Jan 1 00:00:00 1970 From: vinod.koul@intel.com (Vinod Koul) Date: Mon, 3 Oct 2016 09:09:24 +0530 Subject: [PATCH V4 05/10] dmaengine: qcom_hidma: make pending_tre_count atomic In-Reply-To: References: <1475115167-5898-1-git-send-email-okaya@codeaurora.org> <1475115167-5898-6-git-send-email-okaya@codeaurora.org> <20161001061906.GG2467@localhost> Message-ID: <20161003033923.GQ2467@localhost> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sat, Oct 01, 2016 at 11:19:43AM -0400, Sinan Kaya wrote: > On 10/1/2016 2:19 AM, Vinod Koul wrote: > >> Making it atomic so that it can be updated from multiple contexts. > > How is it multiple contexts? It's either existing context of MSI, not both! > > > > I was trying to mean multiple processor contexts here. The driver allocates 11 > MSI interrupts. Each MSI interrupt can be assigned to a different CPU. Then, > we have a race condition for common variables as they share the same interrupt > handler with a different cause bit. > > I will put the above description into the commit text. Sounds better :) -- ~Vinod