diff options
Diffstat (limited to 'meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0077-MOST-dim2-add-timeouts.patch')
| -rw-r--r-- | meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0077-MOST-dim2-add-timeouts.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0077-MOST-dim2-add-timeouts.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0077-MOST-dim2-add-timeouts.patch new file mode 100644 index 0000000..d47c5c6 --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0077-MOST-dim2-add-timeouts.patch @@ -0,0 +1,46 @@ +From f02aa2831e169a9f17eebb2784db4c95944ba927 Mon Sep 17 00:00:00 2001 +From: Andrey Gusakov <andrey.gusakov@cogentembedded.com> +Date: Mon, 25 Sep 2017 07:13:29 +0300 +Subject: [PATCH] MOST: dim2: add timeouts + +Get rid from loop hang if device not functional + +Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com> +Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com> +--- + drivers/staging/most/hdm-dim2/dim2_hal.c | 8 +++++++- + 1 file changed, 7 insertions(+), 1 deletion(-) + +diff --git a/drivers/staging/most/hdm-dim2/dim2_hal.c b/drivers/staging/most/hdm-dim2/dim2_hal.c +index 231138c..ee0e307 100644 +--- a/drivers/staging/most/hdm-dim2/dim2_hal.c ++++ b/drivers/staging/most/hdm-dim2/dim2_hal.c +@@ -18,6 +18,7 @@ + #include "dim2_errors.h" + #include "dim2_reg.h" + #include <linux/stddef.h> ++#include <linux/delay.h> + + /* + * Size factor for isochronous DBR buffer. +@@ -148,11 +149,16 @@ static void free_dbr(int offs, int size) + + static void dim2_transfer_madr(u32 val) + { ++ int timeout = 1000; + dimcb_io_write(&g.dim2->MADR, val); + + /* wait for transfer completion */ +- while ((dimcb_io_read(&g.dim2->MCTL) & 1) != 1) ++ while ((dimcb_io_read(&g.dim2->MCTL) & 1) != 1) { ++ if (--timeout == 0) ++ break; ++ udelay(1); + continue; ++ } + + dimcb_io_write(&g.dim2->MCTL, 0); /* clear transfer complete */ + } +-- +1.9.1 + |