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Fri, 05 Jun 2026 08:19:52 -0700 (PDT) Received: from junjungu-PC.localdomain ([223.166.246.74]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c85df0be0f0sm7954308a12.30.2026.06.05.08.19.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Jun 2026 08:19:51 -0700 (PDT) From: Felix Gu Date: Fri, 05 Jun 2026 23:19:47 +0800 Subject: [PATCH] spi: rzv2h-rspi: fix incorrect readl() accessor for 8-bit RX path Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260605-rzv2h-rspi-v1-1-c1d5ed562249@gmail.com> X-B4-Tracking: v=1; b=H4sIABLpImoC/yXMQQ5AMBBA0avIrDWpihJXEQvawVggM4gQd1cs3 +L/CwSZUKCMLmDcSWieApI4Ajc0U4+KfDAYbay2OlN87mZQLAup1BXeJ7bo2txACBbGjo5vVtW /ZWtHdOt7gPt+ACaDeUhuAAAA X-Change-ID: 20260605-rzv2h-rspi-3c8dd168fb72 To: Fabrizio Castro , Mark Brown Cc: linux-spi@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Felix Gu X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1780672790; l=1014; i=ustc.gu@gmail.com; h=from:subject:message-id; bh=F/91aYGOp0TA4Df0ndhGc9g7+0e11u48hDY7fSepMX0=; b=HepSfuexrpj6g8kfJG5KY1eSs6Sp3+IaYBt5zzn/iDBlV1091dTONl7FFS8zbuFSKE1k4oDhJ 7FcKOIxWMh0C7yLiZT0SnEVc55ARLok0i7Q8jWA1uz4tJpU2aKHT9iF X-Developer-Key: i=ustc.gu@gmail.com; a=ed25519; pk=fjUXwmjchVN7Ja6KGP55IXOzFeCl9edaHoQIEUA+/hw= The RZV2H_RSPI_RX macro instantiation for u8 data incorrectly uses readl(). It performs a 32-bit read which can consume excess data and cause corruption. Fixes: 8b61c8919dff ("spi: Add driver for the RZ/V2H(P) RSPI IP") Signed-off-by: Felix Gu --- drivers/spi/spi-rzv2h-rspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-rzv2h-rspi.c b/drivers/spi/spi-rzv2h-rspi.c index 1655efda7d20..1406885ccede 100644 --- a/drivers/spi/spi-rzv2h-rspi.c +++ b/drivers/spi/spi-rzv2h-rspi.c @@ -137,7 +137,7 @@ RZV2H_RSPI_TX(writew, u16) RZV2H_RSPI_TX(writeb, u8) RZV2H_RSPI_RX(readl, u32) RZV2H_RSPI_RX(readw, u16) -RZV2H_RSPI_RX(readl, u8) +RZV2H_RSPI_RX(readb, u8) =20 static void rzv2h_rspi_reg_rmw(const struct rzv2h_rspi_priv *rspi, int reg_offs, u32 bit_mask, u32 value) --- base-commit: a225caacc36546a09586e3ece36c0313146e7da9 change-id: 20260605-rzv2h-rspi-3c8dd168fb72 Best regards, -- =20 Felix Gu