linux-kernel - [PATCH] x86/platform/olpc: Fix the error handling of memblock

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Date:   Tue, 21 Jan 2020 17:28:16 -0600
From:   Aditya Pakki <pakki001@....edu>
To:     pakki001@....edu
Cc:     kjlu@....edu, Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Juergen Gross <jgross@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Lubomir Rintel <lkundrak@...sk>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        Allison Randal <allison@...utok.net>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] x86/platform/olpc: Fix the error handling of memblock_alloc failure

In case of an error in memblock_alloc, the code calls both panic and
BUG_ON. Revert the error handling to BUG_ON.

Fixes: 8a7f97b902f4 (add checks for the return value of memblock_alloc*())
Signed-off-by: Aditya Pakki <pakki001@....edu>
---
 arch/x86/platform/olpc/olpc_dt.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/x86/platform/olpc/olpc_dt.c b/arch/x86/platform/olpc/olpc_dt.c
index 26d1f6693789..92d5ce1232ab 100644
--- a/arch/x86/platform/olpc/olpc_dt.c
+++ b/arch/x86/platform/olpc/olpc_dt.c
@@ -137,9 +137,6 @@ void * __init prom_early_alloc(unsigned long size)
 		 * wasted bootmem) and hand off chunks of it to callers.
 		 */
 		res = memblock_alloc(chunk_size, SMP_CACHE_BYTES);
-		if (!res)
-			panic("%s: Failed to allocate %zu bytes\n", __func__,
-			      chunk_size);
 		BUG_ON(!res);
 		prom_early_allocated += chunk_size;
 		memset(res, 0, chunk_size);
-- 
2.20.1