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Commit7e963fb2a3("spi: mediatek: add ipm design support for MT7986") makes a mistake on package dividing operation (one change is missing), need to fix it. Background: Ipm design is expanding the HW capability of dma (adjust package length from 1KB to 64KB), and using "dev_comp->ipm_support" flag to indicate it. Issue description: Ipm support patch (said above) is missing to handle remainder at package dividing operation. One case, a transmission length is 65KB, is will divide to 1K (package length) * 65(package loop) in non-ipm desgin case, and will divide to 64K(package length) * 1(package loop) + 1K(remainder) in ipm design case. And the 1K remainder will be lost with the current SW flow, and the transmission will be failure. So, it should be fixed. Solution: Add "ipm_design" flag in function "mtk_spi_get_mult_delta()" to indicate HW capability, and modify the parameters corespondingly. fixes:7e963fb2a3("spi: mediatek: add ipm design support for MT7986") Signed-off-by: zhichao.liu <zhichao.liu@mediatek.com> Link: https://lore.kernel.org/r/20221021091653.18297-1-zhichao.liu@mediatek.com Signed-off-by: Mark Brown <broonie@kernel.org>
Linux kernel
============
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