Commit ebb5c34d authored by Devyn Liu's avatar Devyn Liu Committed by hongrongxuan
Browse files

spi: hisi-kunpeng: Add validation for the minimum value of speed_hz 

driver inclusion
category: cleanup
bugzilla: https://gitee.com/openeuler/kernel/issues/I9QOAJ


CVE: NA

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We get the configuration of max_frequency from the firmware, which is
used to calculate the clk_div together with the set speed. If the
speed set by the user is too small, it may cause the clk_div to be too
large to exceed the variable range. Therefore, we limit the minimum
value of the speed configuration to the value obtained by
(master->max_speed_hz/CLK_DIV_MAX).

Signed-off-by: default avatarDevyn Liu <liudingyuan@huawei.com>
Signed-off-by: default avatarhongrongxuan <hongrongxuan@huawei.com>
parent d2ab6cad

drivers/spi/spi-hisi-kunpeng.c

+1 −0
Original line number Diff line number Diff line
@@ -501,6 +501,7 @@ static int hisi_spi_probe(struct platform_device *pdev) 
	host->transfer_one = hisi_spi_transfer_one;

	host->handle_err = hisi_spi_handle_err;

	host->dev.fwnode = dev->fwnode;

	host->min_speed_hz = DIV_ROUND_UP(host->max_speed_hz, CLK_DIV_MAX);



	hisi_spi_hw_init(hs);