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[ Upstream commit13462ba181] Clang static analysis reports this problem dw-i3c-master.c:799:9: warning: The result of the left shift is undefined because the left operand is negative COMMAND_PORT_DEV_INDEX(pos) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ pos can be negative because dw_i3c_master_get_free_pos() can return an error. So check for an error. Fixes:1dd728f5d4("i3c: master: Add driver for Synopsys DesignWare IP") Signed-off-by: Tom Rix <trix@redhat.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220108150948.3988790-1-trix@redhat.com Signed-off-by: Sasha Levin <sashal@kernel.org>