Merge "msm: camera: icp: Add write barrier in hfi command write" into dev/msm-4.9-camx (d85f1538) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/media/platform/msm/camera/cam_icp/hfi.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -109,7 +109,19 @@ int hfi_write_cmd(void *cmd_ptr)
		new_write_idx << BYTE_WORD_SHIFT);
		}

		/*
		* To make sure command data in a command queue before
		* updating write index
		*/
		wmb();

		q->qhdr_write_idx = new_write_idx;

		/*
		* Before raising interrupt make sure command data is ready for
		* firmware to process
		*/
		wmb();
		cam_io_w((uint32_t)INTR_ENABLE,
		g_hfi->csr_base + HFI_REG_A5_CSR_HOST2ICPINT);
		err: