From: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Date: Wed, 20 Nov 2019 15:21:42 +0000 (+0100)
Subject: intel/compiler: Return early if read() failed
X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=commitdiff_plain;h=5f78524d9b5c579d492470ebd635178339a551a6

intel/compiler: Return early if read() failed

This was the only warning I could see while compiling Iris.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2821>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2821>
---

diff --git a/src/intel/compiler/brw_eu.cpp b/src/intel/compiler/brw_eu.cpp
index 4ce36fc2597..16600bdc537 100644
--- a/src/intel/compiler/brw_eu.cpp
+++ b/src/intel/compiler/brw_eu.cpp
@@ -394,8 +394,11 @@ bool brw_try_override_assembly(struct brw_codegen *p, int start_offset,
    p->store = (brw_inst *)reralloc_size(p->mem_ctx, p->store, p->next_insn_offset);
    assert(p->store);
 
-   read(fd, p->store + start_offset, sb.st_size);
+   ssize_t ret = read(fd, p->store + start_offset, sb.st_size);
    close(fd);
+   if (ret != sb.st_size) {
+      return false;
+   }
 
    ASSERTED bool valid =
       brw_validate_instructions(p->devinfo, p->store,