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Date: Fri, 22 Mar 2019 12:15:56 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Dmitry Osipenko <digetx@...il.com>, Sowjanya Komatineni <skomatineni@...dia.com>, Wolfram Sang <wsa@...-dreams.de> Subject: [PATCH 4.9 084/118] i2c: tegra: fix maximum transfer size 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sowjanya Komatineni <skomatineni@...dia.com> commit f4e3f4ae1d9c9330de355f432b69952e8cef650c upstream. Tegra186 and prior supports maximum 4K bytes per packet transfer including 12 bytes of packet header. This patch fixes max write length limit to account packet header size for transfers. Cc: stable@...r.kernel.org # 4.4+ Reviewed-by: Dmitry Osipenko <digetx@...il.com> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com> Signed-off-by: Wolfram Sang <wsa@...-dreams.de> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/i2c/busses/i2c-tegra.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -794,7 +794,7 @@ static const struct i2c_algorithm tegra_ /* payload size is only 12 bit */ static struct i2c_adapter_quirks tegra_i2c_quirks = { .max_read_len = 4096, - .max_write_len = 4096, + .max_write_len = 4096 - 12, }; static const struct tegra_i2c_hw_feature tegra20_i2c_hw = {
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