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13f263b60f
Update write() checks to properly detect and handle partial writes. Previously, the write() calls used <= 0 to detect failure. This condition is never true for partial writes (ret > 0 but ret < len), so partial writes were silently treated as success. Fix this by verifying that write() returns the full expected length and treating any mismatch as failure. Link: https://lore.kernel.org/20260504081638.683223-1-agarwal.vineet2006@gmail.com Signed-off-by: Vineet Agarwal <agarwal.vineet2006@gmail.com> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Acked-by: David Hildenbrand (Arm) <david@kernel.org> Cc: Liam Howlett <liam@infradead.org> Cc: Lorenzo Stoakes <ljs@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>