powerpc/pseries/hvconsole: Fix dropped console output

commit 51d3302 upstream. Return -EAGAIN when we get H_BUSY back from the hypervisor. This makes the hvc console driver retry, avoiding dropped printks. Signed-off-by: Anton Blanchard <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
uejji · Aug 5, 2011 · dc96c18 · dc96c18
1 parent 86c361c
commit dc96c18
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/arch/powerpc/platforms/pseries/hvconsole.c b/arch/powerpc/platforms/pseries/hvconsole.c
@@ -73,7 +73,7 @@ int hvc_put_chars(uint32_t vtermno, const char *buf, int count)
 	if (ret == H_SUCCESS)
 		return count;
 	if (ret == H_BUSY)
-		return 0;
+		return -EAGAIN;
 	return -EIO;
 }