libata: Keep shadow last_ctl up to date during resets
libata keeps a shadow copy of the ATA CTL register (which is write only), and only writes to the hardware when the required value doesn't match the shadow. However this copy wasn't being maintained when performing reset functions. This could cause problems for the first operation after a reset when the correct value might not be written to the CTL register. This problem was observed when hotplugging a drive: the identify command was being issued with interrupts enabled, when they should have been disabled. Signed-off-by: NStuart Menefy <stuart.menefy@st.com> Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
Showing
想要评论请 注册 或 登录