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drivers/tty/hvc/hvc_tile.c: properly return -EAGAIN

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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>
This commit is contained in:
Chris Metcalf 2015-05-04 17:25:12 -04:00
parent 5bf6c07a18
commit b4287df829
1 changed files with 2 additions and 1 deletions
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3
drivers/tty/hvc/hvc_tile.c
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@ -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;
}
}