Attempt to fix the issue reported by Alan Grimes with DRM_RADEON_TEXTURE

erroring out when it shouldn't.  The errno could be changed by usleep() between
the ioctl call and the loop check, if a signal was received.  This could cause
an EAGAIN return from the DRM_RADEON_TEXTURE ioctl to not loop again.
Instead of checking errno, check thevalue of ret itself, since it is a saved
(and sign-flipped) copy of errno from the ioctl call.

3 files changed, 3 insertions, 3 deletions

diff --git a/src/mesa/drivers/dri/r200/r200_texmem.c b/src/mesa/drivers/dri/r200/r200_texmem.c
index 7472afeedd..14ee8238ad 100644
--- a/src/mesa/drivers/dri/r200/r200_texmem.c
+++ b/src/mesa/drivers/dri/r200/r200_texmem.c
@@ -427,7 +427,7 @@ static void uploadSubImage( r200ContextPtr rmesa, r200TexObjPtr t,
 	    fprintf(stderr, "DRM_RADEON_TEXTURE:  again!\n");
 	 usleep(1);
       }
-   } while ( ret && errno == EAGAIN );
+   } while ( ret == -EAGAIN );
 
    UNLOCK_HARDWARE( rmesa );
 
diff --git a/src/mesa/drivers/dri/r300/r300_texmem.c b/src/mesa/drivers/dri/r300/r300_texmem.c
index 5c70e2e3c5..ca392762ad 100644
--- a/src/mesa/drivers/dri/r300/r300_texmem.c
+++ b/src/mesa/drivers/dri/r300/r300_texmem.c
@@ -417,7 +417,7 @@ static void uploadSubImage(r300ContextPtr rmesa, r300TexObjPtr t,
 					"DRM_RADEON_TEXTURE:  again!\n");
 			usleep(1);
 		}
-	} while (ret && errno == EAGAIN);
+	} while (ret == -EAGAIN);
 
 	UNLOCK_HARDWARE(&rmesa->radeon);
 
diff --git a/src/mesa/drivers/dri/radeon/radeon_texmem.c b/src/mesa/drivers/dri/radeon/radeon_texmem.c
index d492e190c1..3943afcde0 100644
--- a/src/mesa/drivers/dri/radeon/radeon_texmem.c
+++ b/src/mesa/drivers/dri/radeon/radeon_texmem.c
@@ -304,7 +304,7 @@ static void uploadSubImage( radeonContextPtr rmesa, radeonTexObjPtr t,
    do {
       ret = drmCommandWriteRead( rmesa->dri.fd, DRM_RADEON_TEXTURE,
                                  &tex, sizeof(drm_radeon_texture_t) );
-   } while ( ret && errno == EAGAIN );
+   } while ( ret == -EAGAIN );
 
    UNLOCK_HARDWARE( rmesa );