diff options
| author |   Chris Metcalf <cmetcalf@ezchip.com> | 2015-05-04 17:25:12 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@ezchip.com> | 2015-05-11 11:22:20 -0400 |
| commit | b4287df82991ca608f44d7ac12ad9b3bc39d5baa (patch) | |
| tree | ea4d20b3e8971dd6526b366cbfa2fb1770bfd277 | |
| parent | tile: add <asm/word-at-a-time.h> and enable support functions (diff) | |
| download | linux-dev-b4287df82991ca608f44d7ac12ad9b3bc39d5baa.tar.xz linux-dev-b4287df82991ca608f44d7ac12ad9b3bc39d5baa.zip | |
drivers/tty/hvc/hvc_tile.c: properly return -EAGAIN
We were returning zero if no bytes could be written to the Tilera
hypervisor console device, but this causes the output to be truncated.
By returning -EAGAIN the tty hvc driver will come back and try again,
which gives the semantics we want, and avoids dropping console output.
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
| -rw-r--r-- | drivers/tty/hvc/hvc_tile.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/tty/hvc/hvc_tile.c b/drivers/tty/hvc/hvc_tile.c index 3f6cd3102db5..9da1e842bbe9 100644 --- a/drivers/tty/hvc/hvc_tile.c +++ b/drivers/tty/hvc/hvc_tile.c @@ -51,7 +51,8 @@ int tile_console_write(const char *buf, int count) _SIM_CONTROL_OPERATOR_BITS)); return 0; } else { - return hv_console_write((HV_VirtAddr)buf, count); + /* Translate 0 bytes written to EAGAIN for hvc_console_print. */ + return hv_console_write((HV_VirtAddr)buf, count) ?: -EAGAIN; } } |